graphics: OPTIONS
Requests the x axis be logarithmic in the following plot.
This option is used mainly internally but you can use it
from the input too. Don't be surprised however if your
request is overruled !
Requests the y axis be logarithmic in the following plot.
This option is used mainly internally but you can use it
from the input too. Don't be surprised however if your
request is overruled !
Requests a grid be overlayed on the following plots, which
can make reading the values easier.
The appearance of the grid can be modified via the REPRESENT
graphics command.
By default, no grid is displayed.
Requests a time stamp be displayed on each plot. The string
displayed in the time stamp can be modified with the STAMP
graphics command.
By default, a time stamp is displayed and the stamp indicated
by default the version of Garfield used for making the plot.
By default, the (graphics) screen is cleared before and after a plot
is/has been made. You may however wish to overlay to plots on the
screen and therefore suppress the clears. This can be achieved by
requesting NOCLEAR-BEFORE-PLOT and NOCLEAR-AFTER-PLOT.
Via the graphics REPRESENT command, you can change for instance the
colours of the curves, remove the titles and labels of the second
plot etc.
On workstations where graphics and printout are displayed in different
windows, the automatic clear of the graphics screen after each plot
is useless. You can suppress it by requesting NOCLEAR-AFTER-PLOT.
This option may also be of use to overlay two consecutive plots.
See CLEAR-BEFORE-PLOT for some hints in this respect.
By default, a prompt is displayed to hit return before any graphics
output is sent to the screen.
This is useful on ordinary terminals, but less so on workstations,
and you may wish to switch this option off on such devices.
By default, a message is displayed when the plot is finished and
the user is then prompted to hit the return key before the screen
is switched back to alphanumeric mode.
This behaviour is not meaningful on workstations and it might
therefore be a good idea to switch this option off on such devices.
Various characters have a special meaning for the underlying
graphics system. With HPLOT for instance, the symbols [ and ]
are used to indicate that the enclosed text should be shown
using the Greek font.
If you wish special characters to be interpreted this way,
then specify the option EXECUTE-CONTROL-CHARACTERS. But many of the
built-in plots contain special characters, e.g. [ and ] are used
as delimiters of the units. These plots will therefore not come
out right if you switch this option on. In practice, this option
is only useful if you wish to have full control, in user plots,
over the special characters that a specific graphics system offers.
If on the other hand you select DISPLAY-CONTROL-CHARACTERS,
then [ and ] are displayed as such. Furthermore, on some graphics
systems, several special symbols are easily accessible:
a. In units (recognised by the squared brackets that enclose
them), the strings 'cm2', 'cm3', 'micron', 'microsec' and
'microamp', are shown in their usual way (superscript 2 for
'cm2', Greek mu for 'micron' etc.
b. Some particle names (e.g. electron-, mu+, tau-) as well as
some chemical compounds (e.g. CO2, C3H8) are shown the way
they are normally printed with superscripts to indicate
the charge and subscripts showing the number of atoms per
molecule.
c. Greek letters, diacritics and ligatures are accessible as
SGML entities, e.g. &Ksi; é and ß. For a list
of SGML entities, see for instance:
http://home.eclipse.net/~lionheart/html/entities.html
The default is DISPLAY-CONTROL-CHARACTERS.
Keyword index.
Formatted on 10/11/98.